Pancetta & Greens Frittata

Position rack in upper third of oven; preheat broiler.

Heat oil in a large broiler-safe nonstick skillet or cast-iron skillet over medium-high heat. Add pancetta (or bacon) and cook, stirring frequently, until crisp, 2 to 3 minutes. Reduce heat to medium. Add leeks and continue cooking, stirring frequently, until the leeks have softened, 4 to 5 minutes more. Add greens and cook, stirring, until they are just beginning to wilt, about 1 minute.

Meanwhile, whisk eggs, cheese and pepper in a bowl. When the greens are just starting to wilt, pour the egg mixture over the ingredients in the pan. Using a spatula, carefully scrape the eggs from the edges to the middle of the pan as they cook, allowing uncooked egg to flow under, about 3 minutes. When the eggs are nearly set, place the skillet under the broiler until the top is cooked and the eggs are slightly browned, about 2 minutes. Let stand 5 minutes.

To release the frittata from the pan, run a rubber spatula around the edge, then underneath, until you can slide or lift it out onto a cutting board or serving plate. Cut into wedges and serve.